ALMA Matters


From/de Gerald Schieven
(Cassiopeia – Winter/hivers 2017)

New ALMA Director

After a competitive selection process that began in January 2017, the international governing board of the Atacama Large Millimeter/submillimeter Array (ALMA) has selected Dr. Sean Dougherty as the new ALMA Director for a 5-year term beginning in late February 2018. Dougherty is currently the director of the Dominion Radio Astrophysical Observatory, Canada’s national radio astronomy facility, run by NRC Herzberg Astronomy and Astrophysics. He has served as a member of the ALMA Board representing North America for four years and was the chair of the ALMA Budget Committee for the last two years.

SPICA Status Report

By/par David Naylor, SPICA Canadian HoN and Co-I and Doug Johnstone, SPICA Science Team
(Cassiopeia – Winter/hivers 2017)


This SPICA Status Report is a revised version of a note that was sent to the Canadian SPICA community e-mail distribution list in early November. Since that time we have learned that the ESO M5 selection process has been delayed by a few months and is now expected to take place in February 2018. We remain very optimistic that SPICA will be selected at that time! Canadian astronomers interested in following the developments of SPICA and not already on the SPICA e-mail distribution list should contact David Naylor or Doug Johnstone.
As you may recall, one year ago, 5 October 2016, the SPICA proposal for a mechanically cryo-cooled infrared space telescope was submitted to ESA’s M5 Cosmic Vision call. In total, thirty-five proposals were submitted to that call. We learned on 7 June 2017 that thirteen proposals, including SPICA, made it through the technical and programmatic review, a hurdle designed to ensure that the required technology was feasible and within the M5 budget envelope.  Since that time, these remaining mission concepts have been undergoing rigorous scientific review.
As part of the review process, on 20 October the ESA review committee sent out a list of written questions to each mission team with responses due by 31 October. The questions which the SPICA project received were well posed, but all relatively easily addressed. The final step in the review process was a face to face meeting that took place on in Paris on 8 November. The SPICA PI, Peter Roelfsema, was allowed to take two scientists with him to face the review panel. Accompanied by Takashi Onaka (JAXA) and Martin Girard (CNES), the SPICA team appeared before the ESA panel. Peter Roelfsema reports that the review panel “posed solid/direct questions, mostly for deeper clarification on the answers we had already given, that in my opinion we could address really well. From our side there was no insecurity, no hesitation and we stayed to the point and direct at all times.” Further, “I can safely say that both in the written answers earlier this month as well is in today’s interview we did exactly what was needed – bring across that we have a well-conceived mission, with solid and well-founded science goals, with an open mind as to necessary work and/or adaptations that will need to be done as we learn more in the next years, and all that backed by a very knowledgeable and motivated consortium. I am sure we, again, significantly reinforced our path towards the M5 shortlist.”
According to the ESA M5 review schedule, ESA was to have announced the winning proposals selected for mission studies in December. However, we have recently learned that complications with the M4 decision process have led to a delay in the M5 decision, which is now expected in February 2018. Assuming that SPICA is selected at that time, an outcome for which we remain optimistic, what will follow will be an intense and active three year phase of instrument development to ensure that the Technology Readiness Levels (TRL) of the various subsystems are at the required level (TRL5/6) before the final mission selection, which is due to take place in February 2021.
There is considerable optimism and excitement about the SPICA mission. At the recent consortium meeting in Rome, attended by myself and Doug Johnstone, many of us were taken off guard by the outright confidence of our PI. Furthermore, these recent SPICA team interactions with ESA have all been very positive. Canada was a founding member of the SPICA team, and although it has been a long journey, dating back to our first meeting (also) in Rome in 2009, it appears that very exciting news is imminent.
You may recall that under the current work package breakdown Canada has been assigned the critical high resolution spectrometer (a Martin-Puplett polarizing Fourier transform spectrometer). This builds on Canadian excellence both in academia and industry. The return from this investment to Canadian scientists like yourselves will be more than four times that awarded to the Canadian Herschel SPIRE team. Herschel was, of course, an amazing success, in part due to the great Canadian scientists involved. Indeed, it is most definitely the success of the Herschel mission that has spurred on the SPICA consortium in making its case to ESA.
Finally, as with all missions, CSA funding will depend upon strong support from the scientific community. Missions must be identified in the Long Range Plan (LRP) and must have a strong cadre of scientists who can exploit the scientific return on what will be a significant investment. Your role in this regard is essential.  Toward this end, a series of refereed SPICA science papers have been published (see below) and the next SPICA consortium meeting, Groningen in March 2018, will devote an entire day to science talks. Finally, an open international conference dedicated to SPICA science is being planned for February/March 2019; Doug Johnstone is part of the SOC. 
Clearly these are exciting times for SPICA. On behalf of the mission thank you for your continued support!
SPICA Canada
SPICA Science

CRAQ Summer School Announcement / Annonce d’École d’Été

By/par Robert La Montagne
(Cassiopeia – Winter/hivers 2017)

La version française suit

The Centre for Research in Astrophysics of Quebec (CRAQ) is announcing its annual Summer School, which will be held on June 19-21, 2018 in Montreal, Quebec.


This year’s topic will be “Large-Scale Astrophysics: galaxies and beyond”. This 3-day school will focus on our understanding of galaxies, including galaxy dynamics and populations, their environments and the use of galaxies as cosmological probes. The summer school will include formal lectures from local and international experts in the field.

The CRAQ Summer School is principally aimed at graduate students in the field of physics, astronomy, and astrophysics, although students who have completed an undergraduate program in physics will also be accepted.

There is no registration fee. However, we cannot offer traveling funds or cover lodging expenses. Lodging at a reasonable cost will be made available to the participants on the university campus.

Additional information about the program, registration and accommodation will be available soon on this site.

Email contact:

Le Centre de recherche en astrophysique du Québec (CRAQ) annonce son école d’été annuelle, qui aura lieu du 19 au 21 juin 2018 à Montréal, Québec.


Le thème de cette année portera sur « L’astrophysique à grande échelle : les galaxies et au-delà ». Cette école d’une durée de 3 jours, se concentrera sur notre compréhension des galaxies, incluant la dynamique et les populations de galaxies, leur environnement et l’utilisation des galaxies comme sondes cosmologiques. Cette école d’été comprendra des présentations formelles offertes en anglais par des experts locaux et internationaux dans le domaine.

L’école d’été du CRAQ s’adresse principalement à des étudiants aux cycles supérieurs dans le domaine de la physique, de l’astronomie et de l’astrophysique. Les étudiants ayant complété un programme de premier cycle en physique seront également acceptés.

Il n’y a aucun frais d’inscription. Cependant, nous ne pouvons offrir de subside pour couvrir les frais de déplacement ou d’hébergement. Des chambres à coût abordable sur le campus universitaire seront disponibles pour les participants.

Les informations additionnelles à propos du programme, de l’inscription et de l’hébergement seront disponibles bientôt sur le site.


A Call to Action for Canadian Astronomy in Space

By/par Jeremy Heyl
(Cassiopeia – Winter/hivers 2017)

Over the next few months, the federal government is developing a new long-term plan for the Canadian Space Agency. We believe that the government wants to make a major and possibly transformational investment in space exploration. However, they want to see broad support from the community before they will act.

We developed “A Vision for Canadian Space Exploration” that calls for a sustained, competitive and comprehensive program of science in space over the next decade (see document here) to keep Canada competitive economically, technologically and scientifically. We have presented this vision to members of parliament, the Canadian Space Agency and the responsible ministers.

Now is your chance to drive major change in how astronomy is done in Canada. Canadian astronomers have led globally through partnering in and building the best ground-based facilities. Now astronomy from space plays a larger and larger role in the latest discoveries. Please reach out to your member of parliament to let them know that Canada should invest in space exploration with a sustained program of competitively chosen missions. Let them know how space astronomy can inspire our communities, develop new technologies and train the next generation of innovators for Canada.

Ilaria Caiazzo
Sarah Gallagher
Jeremy Heyl

JCMT Update

By/par Chris Wilson
(Cassiopeia – Winter/hivers 2017)


Anyone on Maunakea in December 2017 will have a chance to see an unusual sight: the JCMT operating without its iconic membrane. (A fantastic picture of the JCMT under “normal” conditions by William Montgomerie is included in this article.) The observatory is planning a month-long observing campaign to see if they can commission the POL-2 polarimeter to operate at 450 microns. If anyone gets a good picture, I would love to see it!

The JCMT continues to perform well and to produce exciting new science results. A recent press release highlights an exciting discovery from one of the large programs, the JCMT Transient Survey of an 18-month recurring twinkle in the submillimetre emission from a young star, which suggests the presence of an unseen planet. The variation was discovered by Hyunju Yoo, graduate student at Chungnam National University and advisor Jeong-Eun Lee, Professor at Kyung Hee University (South Korea) during their analysis of monthly observations of the Serpens Main star-forming region. Their paper was published in ApJ November 1, 2017.

Three of the original seven Large Programs on the JCMT have finished collecting all their data: SCOPE, a continuum survey of pre-stellar evolution focusing on Planck cold cores; MALATANG, a survey of spectral lines (HCN and HCO+) tracing highly excited dense gas in 19 nearby galaxies; and S2COSMOS, a sensitive 2-degree square map of the COSMOS field at 850 microns. The remaining four programs are progressing well. All programs passed their mid-term review last spring.

Observing for some of the nine new large programs began in August 2017 at the start of semester 17A. One of these programs, “HASHTAG”, a deep map of M31 at 850 microns with CO J=3-2 maps in selected regions, has already completed all its CO observing, while other programs (such as JINGLE-II, an extension of the JINGLE nearby galaxy survey to starburst and green valley galaxies) are waiting for their sources to become available in the winter semester. The remaining four programs from the initial large program call have first priority on the telescope during large program nights, which make up 50% of the observing time on the telescope. Summaries and more details on all programs can be found here.

Just as a reminder, all JCMT data (PI and large programs) become public one year after the end of the semester in which the data were taken. Also, although the original call for new members in the large programs has closed, many of the teams continue to accept students and postdocs as new members.

The Board of the East Asian Observatories (EAO) struck a Mid-Term Review Committee to discuss the future of the JCMT. The committee met in July and delivered their report to the Board in October 2017. This report will provide useful input to the EAO Board as they consider whether to renew their contract to operate the JCMT for a second 5-year term. The current JCMT agreement extends until early 2020. The UK university consortium was successful in obtaining a second round of funding to contribute to JCMT operations for an additional three years (taking them to 2021). The current round of Canadian funding from NSERC lasts until March 2019.

The next call for PI proposals for JCMT semester 18B will be issued in mid-February with proposals due in mid-March. Depending on whether or not we can identify new sources of funding in Canada, this call for proposals could be the last call that is open to Canadians PIs.

The DAO 100 Project

By/par James di Francesco
(Cassiopeia – Winter/hivers 2017)

Next year, 2018, will mark the 100th anniversary of the Dominion Astrophysical Observatory. Several celebratory events are being planned to commemorate this historic event. One planned event, the DAO100 Project, will greatly benefit from your contribution. Thank you to all those who have very kindly sent us contributions already!

We wish to celebrate the 100th anniversary by collecting vivid accounts of life at the observatory from its current and former staff, postdocs, students, and visitors over the past several decades. We are looking for your best stories here and invite you to kindly contribute to this ambitious enterprise. Highlights of the collected material will be shared as part of other events planned for the 100th anniversary, and woven into an article to be published in the Journal of the Royal Astronomical Society of Canada.

To stimulate ideas about your contribution, please consider the following about your DAO experiences:

  • When were you at DAO and what role did you play while here?
  • What was the most memorable interaction you had with others at DAO?
  • What was your favourite project?
  • What contribution (e.g., scientific discovery, instrumentation development, computational project, technical or administrative activity) from your time at DAO do you remember most fondly?
  • What was the funniest thing that happened to you during your time here?
  • Was there anything special about DAO you’d like to impart?
  • What significance did DAO play in your life?

Of course, these are just suggestions, and anyone is free to submit any anecdote or particularly meaningful pictures they’d like to share. All contributions will be properly credited to the submitters. (Some light editing may be required, but we will strive to preserve the spirit of all comments and consult with you where necessary to ensure clarity.)

Submissions of any length are welcome but we ask that you focus your recollections to avoid an intended submission from becoming too ambitious to complete. Please send any and all submissions to by 7 January 2018. Also, please share this invitation with your colleagues so we can get the widest possible distribution.

Dr Ingrid Stairs from the University of British Columbia has been awarded the 2017 Rutherford Memorial Medal in Physics from the Royal Society of Canada

C’est avec le grand plaisir que la Société Canadienne d’Astronomie / Canadian Astronomical Society annonce que Dr. Ingrid Stairs de l’université de la columbia britannique a reçu la Médaille Commémorative Rutherford en Physiqes de 2017 de la Société royale du Canada. Le résumé de son biographie dit:

“Ingrid Stairs est une spécialiste internationale qui recherche et utilise des étoiles à neutrons émettrices de signal radio (pulsars) afin d’étudier et de tester les théories de la gravité. Les pulsars, en particulier ceux de systèmes binaires, servent de laboratoires uniques dans lesquels il est possible d’étudier la théorie de la gravité d’Einstein et toute déviation éventuelle de cette théorie. La Professeure Stairs a exploité ce facteur dans de nombreuses situations et continue en développant des instruments de pulsar sophistiqués.”

Maunakea Spectroscopic Explorer (MSE) Update


By/par Patrick Hall, MSE Management Group Member
(Cassiopeia – Summer/été 2017)

As discussed at the CASCA meeting, the Maunakea Spectroscopic Explorer (MSE) project has just wrapped up a series of subsystem conceptual design reviews.

Video of the Telescope Structure Conceptual Design

The conceptual design for MSE’s telescope structure by the Spanish firm IDOM has passed its review with flying colours. The 11.25m aperture MSE will fit within a structure only slightly wider than currently exists at CFHT. Details and a video of IDOM’s mount for MSE are available at this link.

More Conceptual Design Reviews

Many MSE partners and work packages delivered conceptual designs for review in Waimea and elsewhere this quarter:

  • Enclosure (Empire Dynamic Structures), held in Port Coquitlam, BC.
  • High Resolution Spectrograph (NIAOT, Nanjing). The Project Office welcomed the NIAOT team, including the Director of NIAOT, for this 2 day review.
  • Fiber Positioning Systems (a competitive study between teams from AAO, UAM and USTC).
  • Fiber Transport System (Herzberg Institute together with Fibertech Optica, Canada).
  • Real Time Software Architecture (staff at CFHT).
  • Top-End Assembly (INSU-DT and GEPI, France).
  • Low Resolution Spectrographs (CRAL, France) in Lyon, France.

With the completion of the subsystem conceptual design reviews, the next step is to undertake a project-wide system conceptual design review and then a cost review. The Project Office staff are now shifting gears from reviewing designs to preparing material for review, and plan to defend the system design in the last quarter of 2017.

Other Activities

The MSE Management Group held its 2017Q1 meeting by telecon. The components of a Design Phase Master Agreement are under discussion. Such an agreement would spell out past and planned pre-construction contributions from each partner and the corresponding science return in terms of access to MSE survey data as compensation for those contributions.

Canadian astronomers with questions or comments about MSE or MSE governance can contact their MSE MG members, Greg Fahlman and Pat Hall).

The MSE Science Advisory Group began the year by reviewing the MSE Science Requirements Document and prioritizing the first light science capabilities for a nominal 2026 first light. The results of this discussion by the SAG will inform the prioritization of different system elements in the upcoming project-wide system conceptual design and cost reviews.

Canadian astronomers with scientific questions or comments about MSE can contact their MSE SAG members, Kim Venn and Sarah Gallagher.

President’s Message

2014-06-27-Prof. Roberto Abraham

By/par Roberto Abraham, CASCA president
(Cassiopeia – Summer/été 2017)


Many of us have just returned from a very successful CASCA Annual General Meeting in Edmonton. This was a terrific meeting and we owe our colleagues in Alberta our thanks for putting it together. This year’s CASCA AGM featured some wonderful talks (Dicke’s Superradiance, which I’d not even heard of before the meeting, turns out to be a really interesting thing) and interesting discussion sessions. Several of these sessions focused on topics of great significance for our community, such as the space astronomy funding situation and progress in the construction of the Thirty Meter Telescope. We all look forward to more interesting talks and more stimulating discussion at the 2018 CASCA AGM in Victoria.


As I described in my last President’s Message, a major focus of the CASCA Board’s recent activity has been to put into place a formal advisory structure for Canadian participation in the Thirty Meter Telescope project. I’m pleased to be able to report that the CASCA-ACURA TMT Advisory Committee (CATAC) was put into place at the start of this year, and many of you were able to witness it in action at the CASCA AGM. CATAC is being led by Prof. Michael Balogh (Waterloo), and in my opinion he has done an extraordinarily good job managing this new committee.

The specific terms of reference for CATAC are carefully spelled out in a formal document, but the gist is that CATAC has two major roles:

  1. This committee continuously assesses progress in the TMT project, making sure that TMT meets the scientific, technical and strategic goals set out in the Long-range Plan, and it feeds this information to the LRP Implementation Committee.
  2. It acts as a conduit for consulting with and informing the community about the state of the TMT project.

An initial very significant activity of CATAC has been to provide CASCA and ACURA with a detailed assessment of the strengths and weaknesses of constructing TMT on La Palma, in the form of a detailed report. The report is, I think, a model for these kinds of things. It even got written up in Nature! The findings and the recommendations in this report make for important reading and I think you should take a look at it. The high-level summary is that building TMT on Mauna Kea is clearly the preferred option for our community, but building TMT on La Palma would still result in a very exciting telescope that would deliver transformational science for the Canadian astronomical community. Some of the disadvantages of La Palma cannot be overcome (e.g. its lower altitude limits performance at longer mid-infrared wavelengths), but others can be overcome by careful planning and an appropriate funding model. The various trade-offs, strengths and weaknesses in the project are described in detail in the report… please check it out.

By creating CATAC and populating it with astronomers with different areas of expertise, and trying to be inclusive with respect to institutional geography, gender and career stage, CASCA and ACURA have set in place a credible and representative structure for community-based feedback and advice. I think this committee is firing on all cylinders (thanks again, Michael Balogh and everybody serving on CATAC) and it’s really impressive to see it work. CATAC meets frequently (approximately weekly by telecon, though in between there is considerable discussion via email and via the Slack groupware system) and it has succeeded in spreading TMT expertise and engagement over many institutions. In my opinion this aspect of the committee’s activity will have an even more enduring impact than its first report, because the more Canadians get involved in the project, the more they feel a sense of ownership in it, at least if our community’s feelings about CFHT can be taken as a guide. For this reason, I was particularly pleased by CATAC’s decision to open four meetings to CASCA members, via Webex. These open meetings included presentations by key people in the TMT project. Armed with this information, members of the community provided thoughtful advice to CATAC, who discussed this at length and synthesized the community’s feedback into the final report. This activity has already had an impact, with more thinking at the project level now being focused on hardware (such as an adaptive secondary mirror) and operational models (such as an adaptive queue) that are of particular importance to the Canadian community.

Advancing the Long Range Plan

The long description above might give you the impression that the CASCA Board did nothing but focus on TMT this year. This is far from true! We were kept busy by many other things. For example, the federal government solicited feedback from us on a number of matters of relevance to the astronomical community, and CASCA, acting in partnership with ACURA and Industry as part of the Coalition for Canadian Astronomy, responded in the following ways:

  • The Coalition provided written input to Canada’s Innovation Agenda, and to the federal government’s Fundamental Science Review Panel. The Coalition also provided a pre-budget submission the federal government, noting the commitment needed to fulfil the aspirations in the Long Range Plan.
  • On behalf of the Coalition, I met with the Fundamental Science Review Panel in Calgary. Once again, the emphasis was on the items in the Long Range Plan.
  • Last Fall, the Coalition mailed out a summary of the conclusions of the CASCA Mid-Term Review to all MPs. This Spring we sent each MP a beautifully-printed copy of the full review.

In addition to providing feedback to specific requests from the government, we also acted in a pro-active manner in a number of ways. For example:

  • On behalf of the Coalition, I flew to Ottawa to meet with representatives from the Aerospace Industry Association of Canada to consider ways in which CASCA could partner with them on topics of mutual interest.
  • On May 9 the coalition co-chairs (Don Brooks, Guy Nelson and I) traveled to Ottawa and met with Genevieve Tanguay (VP, Emerging Technologies, NRC), John Burnett (Director of Policy, Office of the Minister of Science), and Marilyn Gladu (Conservative Party Science Critic).

These latter meetings were particularly useful, not only for informing government about our aspirations in the LRP, but also for hearing back from them about ways we could better align ourselves with top-level national goals (an important component in our success). For example, in our discussions with NRC we discussed challenges to do with Compute Canada and the Canada Foundation for Innovation (which has not clearly understood the close linkage between University-based and NRC-based researchers), and we learned that NRC needs help with outreach and public communications. I think that CASCA members should try hard during our outreach activities to communicate how success in Canadian astronomy is at least partially a function of a close partnership between NRC, Universities, and Industry. I hope you can help by touching upon this theme when describing our activities to the general public.

In the coming months the CASCA Board and its various committees will continue to work hard on your behalf. There are a few big-ticket items coming up, and I expect we will be focusing considerable energy on advocacy for the space astronomy and radio astronomy portions of the Long Range Plan, and on a professional climate survey being prepared by the Equity and Inclusivity Committee.

Let me conclude by apologizing yet again for a somewhat overlong President’s Message, and on behalf of the CASCA Board, I extend to you our very best wishes for a healthy, happy, and productive summer.

NRC Herzberg News / Nouvelles du CNRC Herzberg

From/de Dennis Crabtree (NRC-Herzberg)
Avec l’apport de/With contributions from Chris Willott

(Cassiopeia – Summer/été 2017)

La version française suit

These reports will appear in each issue of E-Cass with the goal of informing the Canadian astronomical community on the activities at NRC Herzberg.

Feedback is welcome from community members about how NRC Herzberg is doing in fulfilling our mandate to “operate and administer any astronomical observatories established or maintained by the Government of Canada” (NRC Act).

Canadian Time Allocation Committee (CanTAC)

CanTAC met in May to discuss and rank CFHT and Gemini proposals for semester 2017B. The meeting was hosted by Stanimir Metchev at Western. The CanTAC SuperChair for this meeting was Ingrid Starirs (UBC), while the Galactic panel chair was Stanimir Metchev (Western) and the Extragalactic panel chair was Eric Steinbring (NRC Herzberg). Dennis Crabtree continues to serve as the technical secretary.

The full list of CanTAC members for the May meeting was:

Galactic Extragalactic
Laurent Drissen (Laval) Peter Capak (Caltech)
Christopher Johns-Krull (Rice) Pat Cote (NRC)
Stanimir Metchev (Western) Julie Hlavacek-Larrondo (Montreal)
Els Peeters (Western) Adam Muzzin (York)
Leslie Rogers (Chicago) Eric Steinbring (NRC)
Samar Safi-Harb (Manitoba) Ludo van Waerbake (UBC)

For Semester 2017B CanTAC received 27 CFHT proposals (17 Galactic and 10 Extragalactic) and 36 Gemini proposals (21 Galactic and 15 Extragalactic). The subscription rates were 2.41 for CFHT, 1.91 for Gemini North and 1.90 for Gemini South.

NRC Herzberg commissioned a study of gender systematics in CanTAC grades. CFHT and Gemini proposal grades over 10 recent proposal cycles were analyzed by a social sciences PhD student at Queens under the supervision of Kristine Spekkens. The analysis shows that except for faculty principal investigators (PIs), proposals submitted by female PIs were rated significantly worse than those submitted by male PIs.

To address this issue we will be changing the format of Gemini and CFHT proposals. In the future, all investigators will be listed alphabetically and the PI will not be identified.

JWST Update

This summer the James Webb Space Telescope will undergo its final cryo-vacuum test at Johnson Space Center, Houston. The telescope, including the science instrument module, will be subjected to a range of thermal and optical tests. This 93 day long test program will verify models and performance specifications to ensure that the telescope performs as designed.

At the same time astronomers across the globe are gearing up to prepare JWST science programs. The Director’s Discretionary Early Release Science (DD-ERS) program will use about 500 hours of time early in Cycle 1 to provide example science use cases of a range of instrument modes. This data will have zero proprietary time so prospective users will be well informed of instrument capabilities in advance of the Cycle 2 Call for proposals. The Cycle 1 General Observer Call for proposals is due for release in November this year. This is a significant milestone for the community as they plan proposed JWST observations.

There are many ways to prepare yourself for writing JWST proposals. The Space Telescope Science Institute (STScI) has extensive and increasing documentation. Also available are a set of observation planning tools including the Astronomer’s Proposal Tool (APT), Exposure Time Calculator (ETC) and target visibility tools. This fall the Canadian JWST team, led by PI Rene Doyon, will organise several events aimed at Canadian JWST users including university visits and webinars. The recent announcement at the CASCA meeting in Edmonton of science support funding for JWST users from the Canadian Space Agency is very welcome and will allow the Canadian community to get the most science out of our national investment in the facility.

JWST will be launched into a halo orbit around L2 on an Ariane V rocket in October 2018.

JWST being prepared for cryo-vacuum testing in the Apollo era Chamber A at Johnson Space Center, Houston. NASA (Chris Gunn)

JWST being prepared for cryo-vacuum testing in the Apollo era Chamber A at Johnson Space Center, Houston. NASA (Chris Gunn)

Les rubriques qui suivent reviendront dans chaque numéro du bulletin et ont pour but de tenir les astronomes canadiens au courant des activités de CNRC Herzberg, Astronomie et astrophysique.

Les commentaires des astronomes sur la manière dont CNRC Herzberg, Astronomie et astrophysique s’acquitte de sa mission, c’est-à-dire « assurer le fonctionnement et la gestion des observatoires astronomiques mis sur pied ou exploités par l’État canadien » (Loi sur le CNRC), sont les bienvenus.

Comité canadien d’attribution du temps d’observation (CanTAC)

Les membres du CanTAC se sont entretenus en mai afin d’examiner et d’ordonner les demandes du semestre 2017B se rapportant aux observatoires CFHT et Gemini. Stanimir Metchef, de l’Université Western, était l’hôte de la rencontre. Ingrid Starirs (UBC) a agi à titre de super-présidente à l’occasion, Stanimir Metchev (Université Western) présidant le Groupe galactique et Eric Steinbring (CNRC Herzberg), le Groupe extragalactique. Dennis Crabtree continue de servir de secrétaire technique au Comité.

La liste complète des membres du CanTAC qui ont assisté à la réunion de mai est la suivante :

Groupe galactique Groupe extragalactique
Laurent Drissen (Laval) Peter Capak (Caltech)
Christopher Johns-Krull (Rice) Pat Cote (NRC)
Stanimir Metchev (Western) Julie Hlavacek-Larrondo (Montreal)
Els Peeters (Western) Adam Muzzin (York)
Leslie Rogers (Chicago) Eric Steinbring (NRC)
Samar Safi-Harb (Manitoba) Ludo van Waerbake (UBC)

Le CanTAC a reçu 27 demandes pour le CFHT (17 du Groupe galactique et 10 du Groupe extragalactique) ainsi que 36 demandes pour l’observatoire Gemini (21 du Groupe galactique et 15 du Groupe extragalactique), pour le semestre 2017 B. Les taux d’adhésion se chiffraient à 2,41 pour le CFHT, à 1,91 pour Gemini Nord et à 1,90 pour Gemini Sud.

Le CNRC Herzberg a commandé une étude sur le temps d’observation octroyé par le CanTAC, selon le sexe. Sous la supervision de Kristine Spekkens, un doctorant en sciences sociales de l’Université Queens a examiné les demandes de temps d’observation pour le CFHT et l’observatoire Gemini accordées au cours des dix derniers cycles. L’analyse révèle que, si l’on fait exception des chercheurs principaux (CP) attachés à une faculté, les demandes soumises par les CP de sexe féminin reçoivent une note beaucoup plus basse que les demandes présentées par les CP de l’autre sexe.

Afin d’y remédier, on modifiera le format des demandes pour l’observatoire Gemini et le CFHT. Dorénavant, les chercheurs seront énumérés par ordre alphabétique et le CP ne sera pas identifié.

Nouvelles du JWST

Cet été, le télescope spatial James Webb (JWST) subira ses derniers essais sous vide et sous zéro au Johnson Space Center de Houston. Le télescope et son module d’instruments scientifiques seront soumis à une batterie de tests thermiques et optiques. Le programme d’essais de 93 jours servira à vérifier les modèles ainsi que les spécifications de rendement pour s’assurer que le télescope fonctionne bien de la façon dont il est censé le faire.

Parallèlement, les astronomes du monde entier se préparent en vue des programmes scientifiques du JWST. Ainsi le programme DD-ERS (Director’s Discretionary Early Release Science ou programme discrétionnaire du directeur sur la diffusion hâtive des données) disposera d’environ 500 heures d’observation au début du premier cycle, de manière à illustrer la façon dont les instruments peuvent être utilisés à des fins scientifiques dans divers modes. Puisqu’aucun droit d’exclusivité ne s’applique aux données résultant de ces observations, les utilisateurs auront une bonne idée des capacités des instruments avant que s’amorce le deuxième cycle de demandes de temps d’observation. L’appel à projets pour les observations générales du premier cycle devrait avoir lieu en novembre, cette année. Il s’agit d’un jalon marquant pour les astronomes qui planifient d’utiliser le JWST pour leurs observations.

On peut se préparer de nombreuses façons à la rédaction d’une demande pour le JWST. Ainsi, le Space Telescope Science Institute (STScI) propose une documentation abondante, qui ne cesse d’augmenter. On y trouvera aussi divers outils facilitant la planification des observations, y compris l’APT (Astronomer’s Proposal Tool — outil de rédaction des demandes d’astronomie), l’ETC (Exposure Time Calculator – calculatrice du temps d’exposition) et des aides pour calculer la visibilité de la cible. Cet automne, l’équipe canadienne du JWST, pilotée par René Doyon, organisera plusieurs activités à l’intention des utilisateurs canadiens du JWST, notamment des visites à l’université et des webinaires. L’annonce que l’Agence spatiale canadienne financera les activités scientifiques des utilisateurs du JWST, faite récemment à la réunion de la Société canadienne d’astronomie, à Edmonton, est certainement la bienvenue et permettra aux astronomes canadiens d’exploiter scientifiquement au mieux les sommes que l’État a injectées dans l’installation.

Le JWST sera lancé sur son orbite en halo autour du point de Lagrange L2 au moyen d’une fusée Ariane V, en octobre 2018.

Préparation du JWST en vue des essais sous vide et sous zéro à la chambre A du programme Apollo, au Johnson Space Center de Houston. NASA (Chris Gunn)

Préparation du JWST en vue des essais sous vide et sous zéro à la chambre A du programme Apollo, au Johnson Space Center de Houston. NASA (Chris Gunn)